Positivity bounds on dark energy: when matter matters
File(s)
Accepted version
Author(s)
de Rham, Claudia
Melville, Scott
Noller, Johannes
Type
Journal Article
Abstract
Positivity bounds — constraints on any low-energy effective field theory imposed by the fundamental axioms of unitarity, causality and locality in the UV — have recently been used to constrain scalar-tensor theories of dark energy. However, the coupling to matter fields has so far played a limited role. We show that demanding positivity when including interactions with standard matter fields leads to further constraints on the dark energy parameter space. We demonstrate how implementing these bounds as theoretical priors affects cosmological parameter constraints and explicitly illustrate the impact on a specific Effective Field Theory for dark energy. We also show in this model that the existence of a standard UV completion requires that gravitational waves must travel superluminally on cosmological backgrounds.
Date Issued
2021-08-01
Date Acceptance
2021-07-17
Citation
Journal of Cosmology and Astroparticle Physics, 2021, 2021 (8), pp.1-25
ISSN
1475-7516
Publisher
IOP Publishing
Start Page
1
End Page
25
Journal / Book Title
Journal of Cosmology and Astroparticle Physics
Volume
2021
Issue
8
Copyright Statement
© 2021 IOP Publishing Ltd and Sissa Medialab. This is an author-created, un-copyedited version of an article accepted for publication/published in Journal of Cosmology and Astroparticle Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at 10.1088/1475-7516/2021/08/018
Identifier
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000686656000004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
Subjects
Astronomy & Astrophysics
CONSISTENCY
CONSTRAINTS
cosmological parameters from CMBR
dark energy theory
GRAVITY
GROWTH-RATE
modified gravity
PARAMETERS
Physical Sciences
Physics
Physics, Particles & Fields
Science & Technology
TREE-LEVEL UNITARITY
Publication Status
Published
Article Number
ARTN 018
Date Publish Online
2021-08-10